Issued in 1975, this commemorative pair from Mexico celebrates the 1325th anniversary of the founding of Tenochtitlán, the ancient Aztec capital. The 80¢ stamp features an illustration from the Códice Durán depicting the legendary eagle on a cactus — a symbol that inspired Mexico’s national emblem. The $1.60 airmail stamp shows the coat of arms of Mexico City (Escudo de la Ciudad de México). Designed by A. Rojas, these stamps honor Mexico’s pre-Hispanic roots and the enduring legacy of its capital’s mythical origins.